Charge-forming device



. L. R. KIERLAND CHARGE FORMING DEV I CE Filed Dec. 10 1920 WITNESSESHVVE/VTOR Lou/SE K/EPL/WD a ATTORNEYS Patented June 3, 1924.

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'LOUIS R. KIERLAND, OF RUSHFORD, MINNESOTA.

CHARGE-FORMING DEVICE.

Application filed December 10, 1920. Serial No. 429,664.

State of Minnesota, have'invented a new and Improved Charge-FormingDevice, of which the following is a full, clear, and exactde scription.

The present invention relates to new and useful improvements in chargeforming devices for internal combustion motors.

It is one of the objects of the present invention to provide a new andnovel means for supplying heated air to the charge taken in to theintake manifold of the motor.

It is another object of the invention to provide means for supplying theheated air to the charge taken in at a time after the charge has beenformed.

It is a further object of the invention to provide a new and novel meansfor introducing the heated air to the charge formed at a point anteriorto the throttle of the carbureter.

A further object of the invention is to provide means for automaticallycontrolling the flow of fuel to the carburetor.

It is a still further object of the invention to provide automatic meansfor controlling the fuel, which automatic means is thermally controlledand regulated by the temperature of the motor.

With the above and other objects in view, reference is had to theaccompanying drawings, in which Figure 1 is a side elevation partly insection of a charge-forming device constructed in accordance with thepresent invention;

Fig. 2 is a top plan view thereof showing a portion of the device inhorizontal section.

Referring to the drawings, the reference character 5 designates theexhaust manifold of an internal combustion motor, and 6 designates theintake manifold thereof. The reference character 7 designates acarbureter of any desiredtype, and said carbureter is supplied withsuitable fuel by means of the pipe 8 leading thereto from a suitablesource of supply (not shown).

In carrying out the present invention a plurality of concentric pipes 9and 10 are disposed within the exhaust manifold 5 in such a manner as tobe subjected to the heat of the exhaust gases passing through themanifold from the several cylinders of the motor. These pipes arerigidly secured together at one end as at 11, and at this point they aresupported within the manifold by means of a suitable bracket orthe like12. As more clearly shown in Fig. 1, one end of the pipe 9 leads fromthe exhaust manifold, as at 13, and is connected to the carbureter asindicated by the reference character 14 anterior to the throttle valve15 thereof. The opposite end; of the pipe 9 extends through one end ofthe exhaust manifold as at 16, and exteriorly of the exhaust manifold 5,this pipe is provided with a lug or shoulder 17. The reference character18 designates a bracket rigidly secured as at 19 to the exhaustmanifold, and pivotally mounted on the end of said bracket, as at 20, isa lever 21, which lever has an angularly disposed body portion 22, andan angularly disposed end 23. The an gularly disposed end 21 of thelever is provided with an opening 24, through which the pipe 9 passesand the shoulder 17 heretofore mentioned is adapted to engage said leveras at 25.

The fiow of fuel to the carburetor 7 from the pipe 8 is regulated bymeans of a needle valve 26, which needle valve is threaded into the topwall of the carburetor, as at 27, to

provide adjusting means therefor.

In carrying out the invention, the needle valve 26 is provided with arelatively long stem 28, and said stem 28 passes through a bracket 28and is provided upon its upper end with a bell crank lever 29. Theangularly disposed end 23 of the lever 21 is adapted to be pivotallyconnected as at.30, to a lever 29, and in order to maintain the end ofthe lever 21 in contact with the lug or shoulder 17 of the pipe 9, acoil spring 32 is connected as at 33, to said lever 29, and as at 34 toa bracket 35 carried by the exhaust manifold. The end 16 of the pipe 9is bent downwardly as at 40, and the free end 41 of this ipe extendsinto a suitable receptacle 42. ading into the receptacle 42 is a pipe43, and said pipe 43 is adapted to extend to the radiator fillingopening ofthe radiator in connection with which the motor is used. Thebottom wall of the receptacle 42 is open in order that the products ofcondensation within the vapor may be discharged without passing into thepipe 40, and subsequently to the charge-forming device.

The throttle valve 15 is controlled in the ordinary manner by means of apull rod 50 and a lever 51, it being understood that the pull rod 50extends to a suitable point within easy access of the operator.

The device operates in the following manner:

Assuming that the motor is cold and has been started, as it continues tooperate and warms up, the pipes 9 and 10 begin to heat up and the air inpassing through said pipes will likewise be heated. As the pipe 9 heatsup and expands longitudinally, the shoulder 25 rocks the lever 21 aboutits pivotal point 20 and tends to partially close the needle valve 26,thus reducing the supply of fuel to the carbureter 7 Owing to the factthat the air introduced through the pipe 13 to the carbureter is highlyheated since it has passed through the exhaust manifold 5, the operationof the engine will not be disturbed since it is a well-known fact thatif heated air be introduced to the char e, the quantity of fuel may becorrespon ingly reduced.

To promote combustion within the motor, and, at the same time, operateupon a socalled leaner mixture, the air which is introduced into thecarbureter through the medium of the pipe 13, will be taken through thepipes 43 and 40, and will be introduced to the pipe 43 immediately overthe Water in the radiator heretofore mentioned and owing to the vaporsarising from said water, will contain considerable moisture whichmaterially aids in the formation of a charge which is capable of moreperfect combusT,

tion. 1

By this construction it is apparent tha the present invention providesmeans by which the quantity of fuel supplied to the carbureter isautomatically regulated depending upon the temperature of the motor, andalso that as the temperature of the motor rises, the quantity of fuelsupplied to the carbureter is automatically reduced.

In lieu of passing the pipe through the exhaust manifold and leading toa point between the carbureter and the intake manifold 6, it is obviousthat if desired the pi e 40 could be led directly to the lower inta epipe 8 of the carbureter 7 and the moisture -vice, an intake manifold,and an exhaust manifold, an inverted open-ended receptacle spaced fromthe exhaust manifold, a conduit extending longitudinally for a ortion ofthe length of the exhaust manifol and having one end secured in anopening at one end of said manifold, an air conduit extending throughthe first mentioned conduit with the opposite ends carried downwardlyfrom the exhaust manifold, one end of the conduit having communicationwith the closed end of the inverted receptacle, a third conduit incommunication with the closed end of the receptacle, said third conduitbe- ,ing adapted to supply moisture to the receptacle, whereby moistureand air. from the open-ended receptacle is supplied to the secondconduit to be heated by the exhaust manifold, the other end of thesecond conduit being connected to the charge forming device.

LOUIS R. KIERLAND.

